I find cast iron likes a high feed rate.I agree with all the suggestions above, but i've had good luck with a fast feed rate, this requires lots of power from the lathe and good size tool but. I've gotten reflective surface finish with 400rpm and a fast feed but my lathe has 13,5 hp motor, you can try this metod and see if it works for you.
First and foremost, actually can't believe no one asked what material are you attempting to cut ?
Finish has more to do with the material (anything is better than 1018 mild steel), speed, feed and the lead angle of your tool than the nose radius. The nose radius is important but not as important as you might think. Smaller nose radii are usually better than large radii for a lot of reasons. The tool geometry and sharpness of your edges also have a bearing.Thanks all. I spent last night viewing videos on youtube and realize my radius is probably at fault. I need to grind a new tool this morning and apply what I learned and also apply a solvent. I may be back..... thanks again.
(13.5hp is a beast of a motor btw)
Thats why they fly people to the ISS for the whole of the world
Yeah and make random drill holes in their space crafts and find them when they are in space.Thats why they fly people to the ISS for the whole of the world